Boiler



June 28, 1927.

F. B. HOWELL BOILER Original Filed Jan. 17. 1921 A3 Sheets-Sheet l MQ, a.

June 28, 1927- F. B, ,.QWL-:LLv

BOILER Original Filed Jan, 17, 1921 3 Sheets-Sheet 2 June 28, 1927. 1,633,667

F. B. HOWELL BOILER Original Filed Jan. 17. 1921 3 Sheets-Sheet 5 5w /4 Tra/PNE y Patented June 28, 1927.`

UNITED STATES PATENT OFFICE.

FRANK B. HOWELL, OF BUFFALO, NEVI YORK, ASSIGNOR TO AMERICAN RADIATOR COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION 0F NEW JERSEY.

`- BoILnn.

Application filed January 17, 1921, Serial No. 438,053. Renewed November 22, 1926.

My invention relates to improvements in heating` apparatus, and the same has for its object more particularly to provide a boiler adapted for heating large buildings or structures.

Further, saidinvention has for its object to provide a boiler which may be readily enlarged in order to lengthen theipath of travel of the hot gases andproducts ot combustion between the combustion chamber and the smoke outlet stack opening.

Further, said invention has for its object to provide a sectional. boiler composed of a series ot transverse connected sections', of which the forward sections constitute a fuel receptacle and a combustion chamber, and of which the sections arranged to the rear or said forward sections are provided with a. plurality of horizontally staggered water-backed ribs 'forming sinuous iiues eX- tending from the combustion chamber to the smoke outlet or stack opening.

Further, said invention has for its object lto provide a boiler in which the rear wall of the combustion chamber, which also constitutes the front wall of the flue members, is provided adjacent to its upper end with a lining or covering of refractory material in order additionally to heat the gases as the same strike against or impingeV upon said lining or covering as they leave the combustion chamber. l

Further, said invention has for its object to provide al boiler in which the length o the flues may be varied, ,and in which the lue members may be readily removed and replaced by other members in order to direct the course of the gas travel upwardly or downwardly as desired.

Other objects will in partbe obvious and in part be pointed/out hereinafter.

To the attainmentot the,aforesaidobjects and ends my invention' consists in the novel details or construction, and in the combination, connection and arrangement otparts hereinafter more fully described and then. pointed out in the' claims.

In the accompanying drawings Figure 1 is a front elevation showing one form or' boiler constructed according to, and embodying my said invention;

Fig. 2 is an' end View;

Fig. Bis a longitudinal section taken on the line 3--3 of Fig. 1;

showing a modified form of liuc construc- Y tion. and

Fig. 6 is a detail tace elevation illustrating a supplemental flue member whereby the size ot the boiler may be enlarged.

In saiddrawings, 10 designates a boiler or' the sectional type and which is capable ot enlargement transversely and longitudi: nally. The lboiler comprises an outer casing or jacket 11, preferably formed of sheetmetal, and provided with an insulating lining 12. The jacket` is provided at its upper front portion with an inclined portion 18 having a fuel opening therein over which is fitted a frame 14 provided with hinged covers 15. and at the lower portion of its front said jacket 11 is provided with an opening over which is tted a frame 16 provided with hinged doors 17 for controlling the draft and ash pit doors 17a. j

To the upper rear end of the jacket is secured a flanged collar 18 forming a smoke outlet adapted to be connected with a chimney or stack, and directly below said smoke out-let is provided a. clean-out opening over which is fitted a trame 19 provided with a hinged door 20.

vWithin the jacket 11 are arranged the opn erative parts of theboiler comprising a pair of endrsections 21 between which are disposed intermediate sections each comprising a short front member 22, an inner member 2,8, and apair of flue members 24, 25. The

members 22, 23, 24 and 25 are connected together at their. upper and lower ends, and to said end sections 21 by nipples 22 23', 24', 25', respectively', and form four separate series ot connected transverse sections.

lower portion of said inner member 23 is provided with a narrow intermediate portion 23b from whose opposite sides extend forwardly and downwardly inclined fins 23C, forming a series of similarly inclined outlet passages 23d. l

rlhe space 26 between the members y forms a fuel receptacle in which the fuel is supported in a vertical column partly by the bed of ash in the ash pit, and partly by the toes 22 extending from the lower ends of said front members 22.

To the rear of the inner member 23 is disposed an intermediate flue member .24 which is substantially rectangular inroutline and has its lower edges disposed at a distance above the floor level.

The said intermediate flue members 24- are severally provided upon their opposite sides along' their front and top edges, as well as those portions surrounding the nipples 24;', with laterally-extending ribs 24a which register with one another. The said members 24 are also provided upon their forward surfaces, adjacent to their lower edges, with forwardly extending hollow brackets 27. forming a shelf upon which are supported several transverse rows of hre brick or other refractory material 28, forming a heat absorbing and heat-retaining lining or wall against which the hot gases and products of combustion passing from the fuel receptacle 26 to the combustion chamber 29 are caused to impinge as the same enter said combustion chamber. The upper portion or edge of said refractory lining is held in place by forwardly projecting hollow members or lugs 8O provided upon the forward edges of said intermediate flue members 23 adjacent to thev tops thereof.

The intermediate, iiue members are separated upon their opposite sides into three substantially equal horizontal portions, of which the lower and middle portions are wholly separated from each other by laterally projecting hollow ribs 24h which extend entirely across said members and merge at their forward ends, with the vertical portions of the ribs 24a. The upper and middle portions of said members are separated by short laterally projecting ribs 24C which extend only from the rear edge of said member inwardly and terminate near the vertical center of said chamber.

The rear flue members 25 are substantially counter-parts in outline of the intermediate flue members 24, but are reversed, i. e. the forward ends having the nipples 25', are arranged contiguous to the rear edges of the intermediate flue members 24 in which are disposed the nipples 24.

`The rear flu-e members 25 are also divided transversely upon each of their opposite sides into three portions of which the lower and intermediate portions are partly sepa- O0 as rated by short hollow ribs 25a which register with the ribs 2li-l of the intermediate flue members 24. The said ribs 25a extend rearwardly from the front edges of said members and terminate at about the vertical center of said members. The upper and intermediate portions of said yrear flue members 25 are separated by hollow ribs 25"' which extend entirely across said flue members 25, and have their forward ends registering with the rear ends of the short, ribs 241. of the intermediate flue members 24.

The rear ends of said ribs 25C are curved slightly downward in order to deflect the hot gases and products of combustion up- `vardly and forwardly. Further, said ribs 25c have their rear ends terminating near the middle of the clean-out opening controlled by the cover or door 20, in order kto provide access to the upper surfaces of said ribs 25, 24C when it becomes necessary to clean the same. or for any other purposes. The upper rear corners of the rear flu members 25 are eut away to form a transverse collecting flue 31 which communicates with the smoke outlet 18 of the boiler.

Wlhen it is desired to increase or decrease the size of the boiler and to vary the length of the flue travel of the hot gases, it merely becomes necessary to insert appropriatelysized supplemental `flue sections 32, as shown, for example-at Fig. 6. between the inter-- mediate and the rear flue sections 24, 25, respectively. The said supplemental flue sections 32 are provided at their upper and lower ends with nipples 32 and peripheral ribs 32a, and upon their opposite sides with laterally projecting hol.- low ribs 82h, B2C, which extend horizontally across said section and have their opposite ends registering with the rear endsV of the ribs 24, 24h of the intermediate flue sections 24, and the forward ends of the ribs 25a, 25c of the rear flue members 25.

The end sections 21 are provided upon their inner surfaces with ribs and lin parts Vwhich cooperate with corresponding `ribs and tins on the intermediate sections to form the vvarious flues and passageshereinabove described. l

The operation of the boiler is `largely obvious. It need only be noted that the products of combustion and hot gases passing from the fuel receptacle 26 kthrough the inclined passages 231 in the rear wall thereof are initially directed upwardly into the combustion chamber 29 and caused to impinge upon the refractory wall portion or lining 28, and impart a portion of their heat thereto whereby said chamber 29 will be maintained at a high temperature owing to the comparatively large mass of highly heated material located therein. The gases are then caused toV pass downwardly and into the openings 2,9El formed intermediate the lower forward ends of the flue members 24,7and to travel rearwardly below the ribs 24h, 25a; thence upwardly and forwardly between the ribs 24", 25 and the ribs 24", 25c tothe front of said intermediate iue sections 24 and strike the hotv front wall thereorp formed by the vertical ribs 24a. Hereupon the gases will pass upwardly and rearwardly between the ribs 24, 25c and the upper peripheral ribs 24"L to the collecting flue 3l, and to the smoke outlet 18 communicating with the stack.

In the modiiication illustrated at Fig. 5, the boiler construction is essentially the same as that of the main construction except that the flue travel is reversed, that is to say, in the modified construction the hot gases and products of combustion are carried to the top of the combustion chamber 29a, and thence pass rearwardly through the uppermost horizontal iue part 34C, then 'downwardly and forwardly through the intermediate horizontal flue part 35 and against the rear surface of the hot back wall of the combustion chamber, and thence downwardly and rearwardly through the lowermost Hue partv 35h, to the collecting' flue 3la and outlet 18a.

The construction illustrated at Fig. 5 may also be increased or enlarged by inserting one or more supplemental flue sections 32.

It is to be noted particularly that in consequence of the vertical arrangement of the flues it becomes possible to provide an extremely long gas travel, and that as the gases are brought towards the front of the boiler and into forcible contactv with the heated rear wall of the combustion chamber, any yunburned gases which may reach that point will be fully consumed before the same can reach the smoke outlet,

Having thus described my said invention what I claim, and desire to secure by Letters l Vof lues extending from said combustion chamber to the smoke outlet of the boiler, each of said ues comprising a plurality of communicating parts arranged one above the other, substantially as specified.

2. A boiler of the character described comprising front, rear and intermediate series oi connected sections forming a fuel receptacle and a combustion chamber, a series of connected vertical sections constituting the back of the boiler, and a plurality of laterally-extending registering ribs upon the opposite sides of the sections of said series disposed to the rear of the series constituting the front of said combustion chamber; certain of said ribs extending entirely across said sections, and others extending part way across said sections, and the ones extending part way across said sections registering at their outer ends with the outer ends of the ribs extending entirely across the adjoining sections and forming a. vseries of horizontal fines extending from said combustion chamber to the smoke outlet of the boiler, substantially as specified.

Signed at the city of Buffalo, Erie County, inthe State of New York, this 23d day of November one thousand nine hundred and twenty. p

FRANK B. HOWELL. 

